Heating-drum.



No. 738,414. PATENTED SEPT. 8, 1903. E. V. GOULSTON.

HEATING DRUM- APPLICATION FILED OCT. 27, 1902.

I0 MODEL.

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No. 738,4l4.

UNITED STATES Patented September 8, 1909;.

' PATENT OFFICE.

EARL V. COULSTON, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO A. J. LINDEMANN & HOVERSON 00., OF MILWAUKEE, WISCONSIN, A

CORPORATION OF WISCONSIN.

HEATING-DRUM.

SPECIFICATION formingpart of Letters Patent No. 738,414, dated September 8, 1903. Application filed October 2'], I902. Serial No. 12?,845. (No model.)

To aZZ whom it may concern.-

Be it known that I, EARL V. OoULsToN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Heating-Drums, of which the following is a specification, reference beinghad to the accompanyingdrawings, forming a part thereof.

The main objects of this invention are to utilize to the fullest extent the heat that is carried with the products of combustion from stoves and furnaces without obstructing the draft and generally to simplify and improve the construction and operation of apparatus for this purpose.

It consists in certain novel features of construction and in the arrangement and combinations of parts hereinafter particularly described, and defined in the claims.

In the accompanying drawings like letters designate the same parts in the several figures.

Figure 1 is a vertical section on the line 1 1, Fig. 3, of a heating-drum embodying my invention. Fig. 2 is a similar section on the line 2 2, Fig. 3; and'Fig. 3 is a plan or end View of the device.

a is a cylinder or shell, which may be conveniently made of sheet metal, like that employed in the construction of ordinary stovepipe. It is provided at the ends with heads I) b, which may be conveniently made of castiron, with marginal flanges 0, over which the ends of the cylinder or shell a are fitted. Each head is formed or provided with an opening and an outwardly-projecting flange or collar d for connectiug therewith sections of the smoke-pipe of a stove, furnace, or other heater. These openings and flanges or collars may be circular, as shown in the drawings, or oval, according to the shape of the smoke pipe or flue in which the device is to be inserted, and they may be centrally located, as shown, or eccentrically arranged.

Outside ofthe smoke-pipe openings each head has three elliptical or oblong openings 6 e and f, the longer axes of which are arranged circumferentially with respect to the axis of the drum. The openings e e are located on diametrically opposite sides of the head, while the third opening,f, is midway between them, the intermediate openingfin one head being on the opposite side of the drum from the corresponding opening in the other head, as shown in Fig. 1. Both heads I) when cast are formed or provided around the openings 9 and f with inwardly-projecting flanges or collars g g and hfor the attachment of elliptical or flattened airpipes or flues it andj. These pipes may, like the outer cylinder or shell (1., be made of sheet metal. The pipes 2' cl run straight through the drum, on opposite sides thereof, parallel with its axis, while the pipe j runs obliquely through the drum from one head to the other, with its narrow sides pre-' sented toward the inner broad sides of the pipes & 2', between which itisinterposed. The broad side of the intermediate pipe j is thus opposed to the direct course of the hot smoke and productsofcombustion through thedrum, and thus serves to divide and deflect them two pipes hand the inclosing cylinder or shell a,thereby bringing them into contact with and heatingalarge area of radiating-surface without obstructing the draft, the cross-sectional area of the three air-pipes and the space left between them for the passage of smoke being the same from one end of the drum to the other. The heads I) are preferably inclined outwardly, as shown, from their marginal flanges c to the smoke-pipe openings, so that when the drum as it is ordinarily arranged is in a vertical position soot will not readily lodge therein, but will drop down through the smoke-pipe opening in the bottom; The drum is thus made self-cleaning, and as it has no dampers itis self-regulating, requiring no attention whatever for its operation.

As the two heads of the drum are exactly alike, the device may be inverted without aitecting its operation, either head being placed indifierently at the top or bottom.

Various changes in minor details of construction may be made without departing from the principle and intended scope of the invention.

I claim- 1. A heating-drum consisting of a cylinder about equally against the broad sides of the provided with heads having pipe openings and connections, two elliptical or flattened air-pipes passing through opposite sides of said cylinder parallel with its axis, a similarlyshaped air pipe passing obliquely through said cylinder from end to endwith its narrow sides presented toward the inner broad sides of said parallel pipes, substantially as described.

2. A heating-drum composed of a cylinder having heads with central pipe openings and connections and elliptical or oblong openings, whose longer axes are circu mferenti ally arranged with respect to said central openings, two elliptical or oblong air-pipes passing through said cylinder on opposite sides thereof parallel with its axis and a similarly-shaped air-pipe passing obliquely through said cylinder from one side of the central opening in one head to the opposite side of the central opening in the other head, the narrow sides of the oblique, pipe being presented toward the broad inner sides of the parallel pipes, substantially as described.

3. A heating-drum composed of an outer shell having smoke-pipe openings in the ends, two air-pipes passing through said shell on opposite sides of and parallel with its axis and opening through its ends and an elliptical or flattened air-pipe passing obliquely through said shell from end to end with its narrow sides presented toward said parallel pipes, substantially as described.

In witness whereof I hereto affix my signature in presence of twowitnesses.

EARL V. COULSTON.

Witnesses:

CHAS. L. Goss, ALIoE E. Goss. 

